Triaryl stibine solutions



'Patentecl July4 193 3 r UNITEDISTATESP PATENT OFFICE LUDWIG KAUFMANIT, or IBEBLIN-WILMERSDORF, GER-MANY mnrnnxn 's'rrizmn sonnrrons NoDrawing. Application filed lioveinher 24, 1931, Serial No. 577,162, and in Germany December 3, 1930.

My invention relates to triaryl stibine solutions and their application.

It is an object of my invention to eliminate certain difficulties presented bythe old solu- 5' tions, normally in petroleum ether andchloroform. I I

To this end ,I prepare a triaryl stibine solution in fat oil. 7 v I p I have found that fatoils are excellent solvents for triaryl stibines and that the solutions of this type are particularly suitable for performing reactions with triaryl stibines. 1

For instance, it is very dilficult to make a good: alcoholic solution from finished triaryl stibine iodides not onlybecause such iodides are hard to dissolve in alcohol but also be-. cause their high sensitivity may cause separation of iodine during the dissolving operation. 1 Y

I have found thatv if the triaryl stibine iodides are formed in the presenceof fat oils and the concentrationis properly selected, the

a mixture of a fatoil, such as rhicinus oil,

and alcohol or hydrocarbon, and add to the solution thus obtained a corresponding amount of alcoholic iodine solution." 'When this solution is mixed with the first solution a'colourless solution of the formed iodides is obtained immediately which remains clear.

for a long time and from which the iodide is precipitated laterand quite gradually.

The general formula of triaryl-stibine is n n-1)3 and it reacts with iodine as follows: 1 I 1 In this manner I obtain an iodine solution which for a certain period is absolutelysuitdition, on the other hand. it has the good properties of being colourless and of not paper and'exposing it to the'air. The paper will soon'show a brown discoloration which when the paper is wetted changes to the well known iodine starch colour. Active oxygen acts in a similar manner which maybe demonstrated by applying hydrogen peroxide in very thin solution to the starch paper.

I claim: 7

1. As a new composition, a solution of triaryl stibine in fat oil.

2. As anew composition, a solution of triaryl stibine in fat oil and asolvent mix able with said oil.

3. As anew composition, a solution of triaryl stibine infat oil and hydrocarbon.

4:. As a new composition, a solution of. triaryl stibine in fat oil and alcohol.

5.The method of making solutions of' triaryl stibine, comprising the reactionof a solution of triaryl stibine in fat oil with a solution of iodine. V

. 6. The method of making solutions of triaryl stibine, comprising the reaction of a solution of triaryl stibine in fat oil and in a solvent mixable with the fat oil, with a solu- I tion of iodine. V

' I affix my signature. 3 V

i .LUDWIG KAUFMANN.

able and with which all reactions may hep'erformed which require action or transfer of iodine. The solution I is also suitable for therapeutic purposes as while on the one I hand it contains iodine in a very activecon- 

